/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package javax.servlet;

import java.io.IOException;

/**
* A FilterChain is an object provided by the servlet container to the developer
* giving a view into the invocation chain of a filtered request for a resource. Filters
* use the FilterChain to invoke the next filter in the chain, or if the calling filter
* is the last filter in the chain, to invoke the resource at the end of the chain.
*
* @see Filter
* @since Servlet 2.3
**/

public interface FilterChain {

/**
* Causes the next filter in the chain to be invoked, or if the calling filter is the last filter
* in the chain, causes the resource at the end of the chain to be invoked.
*
* @param request the request to pass along the chain.
* @param response the response to pass along the chain.
*
* @since 2.3
*/

public void doFilter ( ServletRequest request, ServletResponse response ) throws IOException, ServletException;

}

